SysMain and Hyperfetch – turn off in win 10

https://www.techosaurusrex.com/windows-10-sysmain-causing-high-disk-or-high-cpu-usage-heres-how-to-disable-it/

But the problem is that, for most people, SysMain starts using up too many resources, showing high disk usage and slowing down your computer to unbearable levels.

services.msc

find SysMain

Right click

Stop and Disabled, then Apply